Furnace-door frame.



L. L. KNOX;

FURNACE DOOR FRAME. APPLICATION mp0 APR. 1?. 19m.

1,168,649, Patented Ja11.18,1916.

3 SHEETS-SHEET I.

g) Q 40 IEVl ENTOR I O N .7 1110p I La QQUAMAXS 97s. 11$M I cum.

wzme'ssss -L, L. KNOX,

FURNACE DOOR FRAME.

- wmcwm mu), APR. 11. 1915. 1468 64 9 Patented Jan. 18, 1914).

3 SHEETS-SHEET 2.

WITNESSES |NVENTQR Patented Jan. 18, 1916 3 SHEETS-SHEET 3.

LUTHER KNOX, F AVALON, PENNSYLVANIA, ASSIGNOE "35G KNGEZ PRESSED & EVELDEID STEEL COMPANY, OF PZTTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Application filed April 17', 1915.

P13. 2 is I of Fig. 1f Fi a view partly in plan and partly i section of the furnace structure shown in Fig. 1. Fig. l is a top plan View, par broken away, of one ofthe door frames. is a front elevation, partlyhio lzen of one o f saifl fram es, and 51g. 0 1s a section on. the line I I or F V broken away.

lily invent 1011 to furnace (loor rames and more particularly to water cooled rames- '1 e objector the water cooled (lOOZ' frame owing a memher which forms one of the st aw hacks for the roof arc if and which. also 1. of the door open- :irle a door consists in .illy

is to provide pointed ou I In the neon panying drawings the nu- 5 moral desi lates the frame of a furnace, which may he in genera of any usual. or suitable character and 1" ich supports the masonry work 3.

I} designates the roof arch furnace, which is supported at its rear on tie masonry wall and at its, front edge by the skew back 5 formed by the uownwardly and inwardly sloping surface of a hollow water cooled door frame member which extends :5 transversely above the door opening 6. i 7 designates the furnace cloors. I

The member 5 is supported on the mesonrv worl: each end and may also be suspended from the frame work 2 in the manner inrlicatecl at 8, or in any other suitable manner. its central portion oil"- iset outwerclly with reference to its end portions, forming the reces 23" through which a the hollow we! coolecl legs 9 of ems. These legs are preferably of 1;

is Specification of Letters Patent.

summon-noon FRAME.

iatentefi 18, 1916.

enial No. 22,680.

shape in cross section, having the inclined surfaces 9 upon which the door 7 seats and slides, these surfaces at their upper ends beingin thepiane of the outer surface of the central part of the member 5. The leg members 9 may be secured to the member 5 in any suitalle manner, by means of the bolted lugs 10.

Any suitable system of connections may be employed for maintaining the circulation of water through the frames. In the arrangement shown, water supply pipe 11 extends across the front of the furnace above the furnace doors with a connection 12- (see Fig. 3) leading clmvnwardly within each of the leg members 9. At its upper end each of said members has a. pipe connection 13 leading upwardly to the upper front portion the furnace, where it 18 shown as discharging into afunnel ll mounted on and connected to a pipe 15. This pipe has connections in which telescopically engage the doors 7 to supply water thereto.

13 designate outlet connections from the end portions of the member 5, and also discharging into the funnels.

l7 designate outlet connections for the doors WfliCil may have portions 18 which telescopically engage the furnace frame be.- tween the doors and discharge therein, the water being carried oif of this frame in any suitable manner.

The pipes 11 and may have the connection 19 provided with a valve 20 so that in case of emergency water can be supplied directly from the pipe 11 to the pipe 15 and thence into the doors through the connections 16. he water supply system shown is illustrative only and any suitable system employed.

The auvantages of my invention result mainly from the provision of the water cooled door frame member 5, which not only forms the skew back for supporting the roof arch at the front of the furnace, but also the upper wall of the door opening of the furnace. By the provision of this member, I avoid the necessity for any masonry or i) ck worlc arch over the door opening and also provide a direct cooling means for supporting a roof arch. The members 5 and 9 being independent of each other any one of the members can be renewed when necessary without disturbing the remainder of the frame.

and having'its bottom Wall constituting the top of the furnacedoor opening; substantially as described. i

'2. A furnace door frame, comprising a hollow water cooled member extending transversely over the door opening of the furnace, said member having an inner beveled side wall forming a skew back directly supporting the roof arch of the furnace, and having its bottom wall constituting the top of the furnace door opening, the outer surface of said member forming a door seating and guiding surface;- substantially as described.

3. A furnace door frame, comprising a. hollow Water cooled member extending transversely over the door opening of"the furnace, said member having inwardly ofi'- set end portions, and separate water cooled-*' leg members removably seating in said off-i sets; substantially as described.

4. A furnace door frame, comprising a. hollow water cooled member extending transversely over the door opening of the furnace, said member having inwardly oflis et end portions, and separate water cooled leg members seating in said offsets, said leg members having outer guiding surfaces, and the central portion of the transverse member extending forwardly into the plane of said guiding scribed.

5. A furnace door frame, comprising a transverse member extending over the furnace door opening with, its. inner surface forming a skew back for the roof arch of the furnace, andits lower surface forming the surfaces; substantially as detop at the furnace door opening, together with leg members extending at either side ofthe outer opening, the central portion of 

